Petee thomas



FIPEBB? UNITED STATES fiUBSTl'itl l a we anaemia corn PATENT Orrrcm PETER THoMAs, oE LBEEFELD, PRUSSIA, GERMANY.

BLEACHll NG FIBER.

SPECIFICATION forming part of Letters Patent No. 266,660, dated October 31, 1882. I l I Application filed March 7, 1882. (No specimens.) Patented in England February 4, 18 82, No. 549.

To all whom it may concern: v

Be it known that I, PETER THOMAS, of the town of Elberfeld, in the Kingdom of Prussia and German Empire, a citizen of the said .Kingdom of Prussia, have invented certain new and useful Improvements in Bleaching withouttheEmploymentof Ohlorineor Chlore; and I do hereby declare that the following is a full,clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in bleaching, and may be employed with especially satisfactory results in bleaching fiber, fibrous matters, yarn, or woven fabrics without the employment of chlorine or chlore. I do not, however, limit the use of my new process to the treatmentof any particular article or material.

In practice my invention may be success fully carried outas follows: The object or objects, material or materials is or are placed in an earthenware, wooden, enameled-iron, or other suitable vessel orrceptacle', and boiled for twelve hours timein a weak solution of caustic soda. The. quantity of caustic soda employed is three and one-half kilograms to ouehundred kilograms of material. As soon as this process is ended the material or materials are cooled, and then placed in a warm bath consisting of a solution of putassiumwpenn-anganate r-its equivalent for a period oftifteen to thirty minutes. The material or materials are now removed from the bath, cooled, and )laced in a bath of boraxin hydrated sulphurous acidthat is, one thousand grams of borax is disble combination of sulphurous matter and.

borax can be employed. The article or material will be permitted to remain in this bath for a period of, say, fronr fifteen to thirty minutes, after which it will be thoroughly washed and rinsed and dried in the open air or by means of a cylindrical machine, or otherwise in any convenient manner.

While, as hereinbefore recited, I con template practicing my invention particularly in bleachlug- 'fiber, fibrous material, yarn, and woven fabrics, I do not limit myself to the treatment of these articles, as it is apparent that the invention may be practiced in connection with articles which might not be regarded as being included within the classes to which those spe cifically mentioned belong.

In the foregoing description I have given formulas and proportions which I have used with satisfactory results; but I'do not limit my claim to the exact proportions which I have without materially aflecting the result, 1

Search R00 Having thus described my invention, what I then treating with a bath of potassium permanganate,andlastly with a solution of horas in hydrated sulphurous acid, as described.

Witnesses:

1). GiSBELL, F. Borrene,

, PETER moans. 

